\begin{tikzpicture}
	\tkzDefPoints{0/0/O, -2/0/A, 2/0/B, -1.5/1.5/C, 1.5/-1.5/D, -1.5/-1.5/F, 1.5/1.5/E}
	\tkzDrawSegments(A,B  C,D  E,F)

	\tkzLabelPoints[below](A, B, D, F, O)
	\tkzLabelPoints[left](C)
	\tkzLabelPoints[right](E)
\end{tikzpicture}

